@book { DasfamiliengerechteHeim,
    title = "Das familiengerechte Heim",
    subtitle = "Nikolaus Ehlen (1886-1965)- Person, Kreis, Hintergrund",
    author = "Rolf {Brüne}",
    year = "2002",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093697"
}